Question

请教MAKELPARAM函数的用法及作用

Answer 1

MAKELPARAM不是API，在C语言里它是宏函数，你可以自己写一个，以下是MAKELPARAM的原型

#define MAKELPARAM(l, h) ((LPARAM) MAKELONG(l, h))

#define MAKELONG(a, b) \
((LONG) (((WORD) (a)) | ((DWORD) ((WORD) (b))) << 16))

你可以参考下面的这个，可以完成同样的功能

Public Function MAKELPARAM(ByVal l As Integer, ByVal h As Integer) As Long
Dim ll As String
Dim lh As String
Dim r As String
ll = Format(Hex(l), "@@@@")
lh = Format(Hex(h), "@@@@")

MAKELPARAM = CLng("h" Replace(lh ll, " ", "0"))
End Function